The first pass wrapped up at the end of last week. The final pass is expected to last between five and seven days, according to Slidell Mayor Freddy Drennan.

Many residents have been upset over how long it has taken for the debris to be picked up since Isaac made landfall on Aug. 30. Drennan said the city is taking time to make sure the process is done right.

"We understand that Hurricane Isaac caused tremendous problems for our citizens, and we're certainly not trying to make things more difficult," said Drennan. "Debris must be sorted because different types are processed at different facilities, so they must be collected separately. Some facilities will accept only vegetative debris, some will accept Sheetrock and carpeting. We're working to ensure we follow FEMA's regulations so that we can request reimbursement for these services."

Residents putting debris out for pickup should put it in a right-of-way zone. Generally, that is the area between utility poles or services and the roadway.

The piles also needed to be divided depending on whether it is vegetative debris, construction debris or appliances/hazardous waste.